Vehicle control system for minimizing fuel consumption

a technology of vehicle control system and fuel consumption, applied in the field of vehicle control system, can solve the problems of increased braking distance, increased fuel consumption, increased fuel consumption, etc., and achieve the effect of reducing the fuel consumption amount of the driving source and increasing the accuracy of minimizing the fuel consumption amoun

a technology of vehicle control system and fuel consumption, applied in the field of vehicle control system, can solve the problems of increased braking distance, increased fuel consumption, increased fuel consumption, etc., and achieve the effect of reducing the fuel consumption amount of the driving source and increasing the accuracy of minimizing the fuel consumption amoun

US8948964B2Active Publication Date: 2015-02-03DENSO CORP

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  • Vehicle control system for minimizing fuel consumption
  • Vehicle control system for minimizing fuel consumption
  • Vehicle control system for minimizing fuel consumption

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0140]A first embodiment of the present disclosure will be explained with reference to FIGS. 1 to 8. FIG. 1 shows a system structure for a vehicle control system according to a first embodiment of the present disclosure, including an air-conditioning apparatus and a brake control apparatus for a vehicle. In the present embodiment, a cool-storage device 40 is provided in the air-conditioning apparatus 15 (hereinafter, A / C apparatus 15), a refrigerating cycle R of which is operated by a variable-capacity type compressor 1. A continuously variable transmission (CVT) apparatus is used as a transmission apparatus 50.

[0141]The A / C apparatus 15 for a vehicle will be explained at first. The compressor 1 is provided in the refrigerating cycle R for withdrawing, compressing and discharging refrigerant. The compressor 1 is of the variable-capacity type, so that flow amount of the refrigerant is continuously controlled in accordance with control current from an air-conditioner control unit 5 (h...

second embodiment

[0273]A second embodiment of the present disclosure will be explained.

[0274]In the first embodiment, the cool-storage device 40 is cooled down by the cold air passing through the evaporator 9. However, the cool-storage device 40 may be provided in the refrigerating cycle, for example, as disclosed in Japanese Patent Publication No. 2009-12721. FIG. 9 is a system structure showing the A / C apparatus 15 for the vehicle according to the second embodiment.

[0275]In FIG. 9, the refrigerating cycle R is composed of the compressor 1, the condenser 6, the receiver 7, the expansion valve 8, the heat-exchanger 9 provided in the passenger compartment (that is, the evaporator 9) and the cool-storage device 40, which are connected in series to each other by refrigerant pipes (indicated by lines) to form the closed circuit. The refrigerant flows in the closed circuit.

[0276]As shown in FIG. 9, the cool-storage device 40 having the cool-storage material 44 is provided in the refrigerant cycle R, thro...

third embodiment

[0279]A third embodiment of the present disclosure will be explained. In the first embodiment, the four compressor-control patterns are provided (FIG. 5) in view of not increasing the computing load for the A / C ECU. However, the number of the compressor-control patterns can be increased when high-speed processing is possible in the A / C ECU.

[0280]FIG. 10 is a graph showing compressor-control patterns according to the third embodiment. As shown in FIG. 10, a delay time “TL” is provided for carrying out the compressor-control patterns 31 to 33 and 35. The delay time “TL” can be changed depending on the rotational speed of the compressor 1 (that is, the rotational speed of the engine 4). As shown in FIG. 10, the compressor-control pattern 35 is provided, wherein the pattern 35 has a sharp inclination for increasing the discharging amount of the compressor 1. The pattern 34 shows that the operation of the compressor 1 is stopped.

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Abstract

A control unit of a vehicle control system estimates running-condition of a vehicle for a predetermined estimation period. A fuel-amount estimating portion estimates an engine condition related to a cooling efficiency, based on the estimated running condition. The control unit estimates multiple possible control patterns and calculates evaluation values related to the cooling efficiency for respective cases, in which a compressor is operated in accordance with each of the control patterns. The control unit selects one of control patterns to actually operate the compressor in accordance with the selected control pattern, so that fuel consuming amount can be reduced.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is based on Japanese Patent Applications No. 2011-253976 filed on Nov. 21, 2011 and No. 2012-160768 filed on Jul. 19, 2012, the disclosures of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to a vehicle control system, according to which an operating condition of a driving source for a vehicle is estimated so as to optimize fuel consuming amount. The fuel consuming amount is necessary for the driving source to operate in-vehicle accessories, such as, an electric-power generator, a compressor for a vehicle air-conditioning apparatus and so on.BACKGROUND[0003]A vehicle control system is known in the art, for example, as disclosed in Japanese Patent Publication No. 2009-29344. According to the vehicle control system (JP No. 2009-29344), a time period is increased for a coast-lock-up operation and a fuel-cut operation in order to improve fuel consumption ratio. In addition, an op...

Claims

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Application Information

Patent Timeline
03 Feb 2015
Publication
US8948964B2
IPC
G06F19/00; B60H1/32
CPC
B60H1/3208; B60H2001/3266; B60H2001/327
Inventors
PAN, LIANGCHEN